I think this is conceptually a good idea, even if this implementation and color choice may leave something to be desired.

The idea that there would be a pilot lamp for self driving itself is a good idea - and while I think this color is fine (ships use green lights for starboard for example) - its obvious from reactions here that further thought and discussion is needed on the matter.

I think once we can agree on a color/mode of operation, a self driving pilot lamp should be a legal requirement - particularly as a means to enhance pedestrian safety.